καταρράκτης

1. as adjective down-rushing , τὸν καταρράκτην ὀδόν (attic for οὐδόν); to the downward entrance [of Hades, Refs 5th c.BC]

2. as Substantive broken water, a waterfall , Lat. cataracta, (Strabo Geographus)

3. a kind of portcullis , (Plutarch)

4. a sea-bird, so called from rushing down upon its prey, a gull , (Aristophanes Comicus) (ML)